Coal-drill.



No. 802,197* PTENTED OCT. 17, 1905. W. H. CLARKSON.

GOAL DRILL.,

APPLIUATION FILED MALL/1.1904.

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111;/ irrt/111111 No. 802,197. PATENTED OCT. 17, 1905. W. H. LARKSON.

COAL DRILL.

APPLICATION PILEE MAR. 4l 1904.

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"WILLIAM II. OLARKSON, OF EDWARDS STATION, ILLINOIS, ASSIGNOR 'IO FLUIDE J. OLARKSON, OF EDWARDS STATION, ILLINOIS.

COAL-Daun..

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed March 4, 1904:. Serial No. 196,622.

To ftZZ whom it may 0071/007171.:

Be it known that LVVILLIAM H. OLARKSON, a citizen of the United States, residing at Edwards Station, in the county of Ieoria and State of Illinois, have invented certain new and useful Improvements in Coal-Drills; and I do hereby declare that the following is a full, clear, and exact description of the invention, which will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in coal-drills.

The object of the invention is to provide an improved form of drill-frame and, further, to provide a new form of boxing' for the threadbar.

A still further object is to provide an improved drill for assisting in the boring operation. y

The invention relates also to various details of construction and arrangement of parts, as will be described in the following specification.

In the annexed drawings, Figure l is a front elevation of the drill set up for use. Fig. 2 is a side view of the same. Fig. 3 is a top View of boxings and driving-gears with the thread-bar and showing' the frame in crosssection. Fig'. 4 is an end View of the threadbar, showing a portion of a crank clamped thereto. Fig'. 5 is a perspective view of a boxing' and its inclosing' member shown in the other figures. Fig'. 6 is a perspective view of a U-shaped support for the member shown in Fig. 5. Fig. 7 is a longitudinal section of my improved form of drill, showing a tubular extension thereof and a chuck member within the hollow thread-bar. Fig. 8 is a vertical section of the inclosing member shown in Fig'. with a half-boxing for the threadbar therein. Fig'. 9 is a perspective View of my improved drill. Fig. 1() is a perspective View of a modified form of drill. Fig. 1l is a longitudinal section of the same. Fig. 12 isa general view of the machine when at work. Fig. 13 is a top view, in part section, of a thread-bar boxing; and Fig. 14C is an end View of the same.

Figs. 1 and 2 show the complete machine, wherein A A are two frame-sections of U form, secured together to constitute a hollow support, as shown. The lower extremities of these sections are bolted together at B, the Lipper ends being free and having between them a bar O, whose Lipper end terminates in a threaded section having an internally threaded sleeve D thereon, said sleeve having' a pin E therein, by which to turn it. A loose collar F is placed upon and surrounds the upper ends of the frame, and by means of a screw Gr therein the said frame ends are clamped tightly together with the bar O between, and by this means the said bar can be adjusted vertically as desired. The sleeve D is pointed, as also is the lower end of the frame A,` so that these extremities may be 'forced into the ceiling' and floor of the mine, and then by turning' the sleeve the frame may be tightened in position for work, all of which will be understood. An adjustable support H is provided, Fig'. 6, for insertion between the limbs of the frame, there being a pair of holes therein to register with pairs of holes .l in the frame, as shown in Fig'. 2. A U-shaped member J is inserted in the holes of the `frame where desired and made to enter the pair of holes in the said support H, thus holding that member rigid. The extremities of the support extend beyond the frame and carry pivotally a tilting member K by means of one of its extremities L. A bolt or pin M, passed through the extremities of the support, also passes through the said member K and forms the pivot therefor. W'ithin the said member K is a threaded boxing for the thread-bar N. This boxing (indicated by O) 'is made in two halves, as in Fig. 5, the abutting' surfaces lying in a vertical plane. The arrangement of these parts is such that the pin M, on which -the member K is supported and pivots, en-

ters a notch P in both boxing-sections, and thus prevents them leaving the member and also serves to keep them in perfect register at all times. By withdrawing the pin M the member K may be removed from its place and the boxing-sections pushed out and repaired or replaced with another pair. Made with the said member K is an arm Q, whose free end constitutes a boxing for supporting a shaft It. This shaft carries a beveled wheel or gear S, which meshes with a similar one, T, on the thread-bar N. 'Ihe thread-bar has a keyway at U, and a key V held in the gear serves to revolve the said thread-bar, while permitting' the latter to progress through the boxing O. It is evident that the said gear l is bored out smooth to permit the thread-bar to freely pass therethrough, its hub bearing' ICO against the boxing O and the member K The latter is provided with two projections L, in order that it may be reversed or placed in any desired position, so that in working in cramped places some adjustment may be had that will permit the work to easily proceed.

The drill shown in the drawings is, in so far as I am aware, novel in its construction and is likewise new for the purpose of drilling' coal. As shown in Figs. 2, 7, and 9, it consists of a tubular member W, of cone shape, its small or contracted end having' connection with a tube X, carried within the thread-bar U. The outer or large end of the drill is dished, and the dished face is provided with a series oi' radiatingcutting-teeth Y. This member l may be removed from the tube X for sharpening' by. removing a screw Z, which passes through a iiange of said member and a reduced projection on the tube X, as indicated in Fig. 7. However, other means may be used to secure these members together, as will be understood. The opposite end of the tube X is cut out to form projecting tongues, only one of which is shown in Fig. 7 by the numeral 2. These tongues are designed to engage with a removable sleeve 3 in the end of the tube, said sleeve having a notch in each end, as shown at 4. As shown in Fig. 4. the sleeve is merely a piece of tubing, the notches 4 being cut at diametrically opposite sides thereof, thus constituting a chuck, it being understood that the tube X has the tongues 4 to engage therewith. A free passage is thus left entirely through the threadbar. The sleeve is held in place by means of a pin 5, which may be withdrawn when desired to release the sleeve. In Figs. 2 and 6 the drilltube X is inclosed in the thread-bar, and as the latter works through the boxing' O during the drilling operation its limit of travel is inally reached, after which no more drilling' can be done. At thistime the drill is withdrawn from the thread-bar and the latter is turned end for end by swinging the frame A on its pivots above and below. This allows the threadbar to operate again in the same manner as before; but this time the drill-tube is seated in the outer end oi' the sleeve 3, as shown in Fig. l2. This allows the operator to increase the length of his drilling apparatus without moving the machine from its original position. Holes 6 at the opposite end of the threadbar permits the sleeve 3 to be located in the thread-bar at that end if-for any reason it is desired to do so, or in preference to this the thread-barafter carrying the drill as far as it will go when arranged as in Fig. 7, the said thread-bar may be withdrawn from the hole leaving the drill. Then the chuck may be removed from its position and placed in the end of the thread-bar just withdrawn from the hole. The drilling may then proceed as before, it having been unnecessary to reverse the position or the supporting-frame.

In use the drill cuts away the material into which it is at work, and said material passes back through the tube X since there is no other outlet and since there is a continuous outlet entirely through the thread-bar, the drill is kept cleared at all times, as will be evident.

In Figs. l0 and ll is illustrated a modiied form of my drill. This form is merely a plate 7 of the desired size having the cutting edges 8, while between them are openings 9 for the escape of the loose material. The openings are created by punching the metal out and bending' the portions down, as shown. These portions are then used to secure the drill to a carrying-tube l0, as before.

I provide for the drilling-machinea crank, as shown, which may be used on the shaft of the gear S or upon the thread-bar, according' to the place in which the drill may be in use. In some places it may be more convenient to use the crankon the thread-bar than ontheshaft of the said gear, or vice versa. In order that the crank may be made to lit both the threadbar and the shaft, the latter is provided with an enlargement of substantially the same size as the thread-bar, so that said crank may be as easily clamped to one as the other by means of a thumb-nut or other convenient means.

In Figs. 13 and 14 I show the form of inclosing member desired to-hold the boxing' O. It will be seen that in preference to making the boxing so that it will just lit into the rnember the opening in the latter is made slightly larger than the boxing, as shown in said ligures, so that one ot' the sections may be shifted to one side in order to release the threadbar. Near each end ot' the housing is a key IOO O', inserted in a hole provided for its reception, and said keys serve to push the boxing back into position when the thread-bar is entered. It will thus be seen that at any time or place the bar can be easily removed without the necessity of entirely removing the boxing from its position.

I have shown in Figs. 1, 2, and 4 the crank for turning the thread-bar clamped upon that member; but I desire to state that it may also be entered through a suitable opening at the end of said bar and held by any good means, taking the place of the pin 5, (shown in Fig. 7,) if desired.

I claim 1. In a coal-drill, a supporting-frame comprising two U-shaped portions secured together rigidly at one end, means for clamping the opposite ends together, and an adjustable bar therebetween adapted to be clamped by said means for the purposes set forth.

2. In a coal-drill, a supporting-frame comprising two U-shaped members secured together to form an open trame, said members rigidly secured together at one end, the opposite ends being' free but adapted to be clamped together, means for clamping said ends, a vertically-adjustable thread-bar between said ends and a threaded sleeve for said thread-bar substantially as set forth and for the purposes described. i

3. A coal-drill frame, comprising an open rectangle, and having' an extended pointed lower end for anchoring purposes, the opposite end being open, a bar slidable between the extremities ofthe open end and having contact with said ends and threaded at its `tree end, a collar surrounding the bar and the extremities of the frame for clamping the said bar between said extremities and an internally-threaded sleeve on the threaded end of the bar, the same being pointed for anchoring purposes substantially as shown.

4. A coal-drill frame comprising an open rectangle, having an extended pointed lower end for anchoring purposes, the opposite end being open, a bar adapted to be clamped between the extremities of the open end and having slidable contact therewith and threaded at its upper free end, a collar inclosing the open ends of the frame and the thread-bar, a screw in the collar for clamping it to the Jframe ends and clamping the thread-bar between the said ends, and a pointed internallythreaded sleeve for said thread-bar substantially as shown and described.

In a coal-drill, a supporting-frame comprising the members A of the form shown, the same being rigidly secured together at their lower ends, the Lipper ends thereot' approaching one another, the adjustable bar C between said ends all adapted to be clamped together, said bar having sliding contact with the frame ends, a collar F surrounding the ends and the bar, the screw Gr 'for clamping them, the adjusting-sleeve D on said bar C and the drill pivotally supported on the frame substantially as described and shown.

6. A coal-drill trame comprising an open rectangle having an extended pointed end, for anchoring purposes, the opposite end being' open, a bar between the extremities of the open ends of the trame and having slidable contact therewith and threaded at its upper free end, a collar inclosing the open ends of v the frame and the thread-bar, a screw in the tures through the housing and boxing through which the said pin passesl to lock the boxing in place substantially as described.

8. In combination with the supportingframe ol a coal-drill, a thread-bar, a split boxing therefor, there being apertures through the housing and boxing' and a pin Jfor passing through one of the apertures for preventing movement of the boxing from the housing, said pin also pivotally securing the housing1 t0 the frame substantially as described.

9. ln combination with the supportingframe o'lI a coal-drill a reversible housing pivoted on said trame, an internally-tlneaded boxing ot' two sections within the housing, there being apertures through the housing and the two sections, an aperture being at the top and one at the bottom and a pivot-pin for entering one or the other oi the apertures and the su pportingframe to `form a pivot on the `frame for the housing and for securing the boxingsections in place the housing being` vertically reversible by means ot the two apertures and the pin.

l0. .ln a coal-drill mechanism comprising a supporting-'frame reversible by a turn on its pivot, a drill-carrying support on the frame, a hollow thread-bar adapted to progress through the said support during revolution thereof, a removable double-ended clutch adapted to be secured in either end o'lI the hollow threadbar, a drill adapted to seat in the chuck and lying inclosed in the thread-bar as shown and driven by the revolution of said thread-bar, the drill adapted also to seat in the outer end oit' the chuck after turning the frame on its pivots for the purposes described.

l1. A coal-drill comprising a supporting.- frame reversible by a turn on its supports as described, a drill-supporting mechanism carried on the said frame, a hollow drill-carrying thread-bar adapted t'or progressive movement through the said drill-supporting mechanism during its revolution, a drill, a drillchuck removably secured in either end of the thread-bar, said drill lying within the said thread-bar and held by the chuck at the farthest end ot' the latter when starting a boring, the position ot' the chuck being changed after drilling the hole to the limit ol movement of the thread-bar, to continue the drilling for the purposes described.

1n testimony whereof I affix my signature in presence ot' two witnesses.

lVILLlAh/l H. CLARKSON.

lith esses: Y

L. M. THURLow, E. J. AniensoL.

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